Mold for building poured concrete structures.



L. c. STEWART I M. A. QumN. MOLD FOR BUILDING POURED CONCRETESTRUCTURES.

APPLICATION FILED MAKYZI, 1914.

Patented Dec. 7, 1915.

COLUMNA PLANQUE/PM C0., WASHINGTON, D. C.

Patented Dec. 7, 1915.

2 SHEETS-SHEET 2.

L. C. STEWART & M. A. QUINN.

APPLICATION FILED MAY 2l, i914.

IZOLUMBIA PLANUGRAPH co.. WASHINGTON. D. C.

MOLD TCR BUTLDTNC PouRED CONCRETE STRUCTURES.

rinirnn srafrns rnrnnr ernten.

L'YMAN C. STEWART ANI) MARSHALL A. QUNN, 0F ROANGKE, VIRGINIA.

-IVIOLD FOILBUIIJDING PGUREDCONCRE'E STRUCTURES.

License.

`Specification of Letters Patent.

Patented Deo. 7,1915.

Application filed I/Zay 21, 1914. Serial No. 840,098.

To all whom t may concern.'

Be it known that we, LYMAN C. STEWART and MARSHALL A.. Quinn citizens ofthe United States, residing at Roanoke, in the county of RoanokeandState of Virginia, have invented certain new and useful Improvementsin Molds for Building `Poured Concrete Structures, of whichthe followingis a specification. 1

Qur invention relates to animprovernent in molds for building pouredconcrete structures, and thepresent invention is a collapsible core.

.l-leretofore in inventions of this general type, difficulty has beenencountered in withdrawing thefcore after `the concrete has set. Thisdifliculty has been largely due to the fact that the core wasnotcollapsible, both widthwise and lengthwise. A

Our present invention provides for both, and lirst of all the collapsewidthwisefor as to thickness, which k.quickly removes the sides of thecore from themolded walls and permits collapse lengthwise to followf, itbeing particularly advantageouswhere a core is employed, as in all casesin which the area of the lower edge `either as to width and length, andsometimes both, may be greater than that of the upper edge; and withthis in view, our invention consists in telescoping sides with spacingmeans therebetween on the toggle-joint principle, which when adjusted inone position holds the sides rigidly apart, and when in another positionmoves them toward each other in a collapse of the core, along withVmeans for varying the width at top and bottom, and other novel featuresof construction and combinations of parts, which will be hereinafterde'- scribed and vpointed out in the claims.

In the accompanying drawings: Figure 1 is a view illustrating a portionof a wall, with some of the outer part broken away'to show the internalconstruction and two or vmore cores in position therein, Fig. 2 is atransverse section through the core, showing it in position in the wall,Fig. 3 is a horizontal section through the core, Fig. l is a view inside elevation with parts broken out, Figs. 5 and 6 are enlargeddetails, and

Fig. 7 is a slightly modified view of the sliding connection at theedges of the core.

The core is made up of four main parts bent from sheet-metal, andconstituting two sides, and each side is composed of two members land 2slidably connected together at their upper and lower edges in anyapproved form, as for instance by means of the inturned flanges 3, 3, onthe sectionsl, 1;,

and overlapping and embracing flanges 4, 4,

on section 2, which receive andare slidably connected with the flanges3, 3. These constitute the sliding, telescoping^joints,1where by thelengthening and shortening of the core isr made both possible "andconvenient. p

'As a slight modification/of thisform of joint, the constructionillustrated in Fig. 7 might be adopted, in which the edges areconcentrically crimped together as at 3 and 4l.

The ends of the core are 'formed by the overlapping, inturned edges 5,5, and 6, 6, and these ends preferably incline at an angle from one.edge'of the mold to the other, although not necessarily, and `whenythey do thus incline, it obviously makes oneedge of the core always-`longer than the other. As stated, this is preferred, for ,thereasonthat 1tg1vesthe required shape to the bond 7 whichisto be formed'betweenthe two sides `is located and housediwithi'nthe sheet-metal core, and itconsists in a plurality of toggle- Joints 8, 8. These may be variouslyconstructed, and one member of each toggle is connected with itscorresponding member at Y the other edge of the core, preferably throughthe medium of an integral rod 10, so that the toggle at both edges aresimultaneously operated by adjusting either one, and the center toggle11 may be operated through a connecting-rod l2 pivotally connected atone end with the toggle and at the other end with the arm 13 projectingfrom one of the rods 10.

It is desirable to adjustably connect the toggle-members together, forthe reason that in many, and perhaps most instances in building a wall,it is desirable to make the lower edge of the core wider than the upperedge. As a simple means of providing for this, and accomplishing itquickly, one member of each toggle may have a slot, such as 14, adaptedto receive a bolt or pin 15 on the other member, which latter is causedto take a position in either of the extreme ends 16 or 17 of the slots,whereby to widen or narrow the edge as the case may be.

The rods 10 form braces to prevent the rlO crushing of the sides, whichare preferably is alternately inverted, so'that the concrete bond 7would iirstbe V-shaped and then diamond-shaped, and these diamond-shapedf bonds are staggered.V That, however, is entirely within the discretionof the builder, Y: but Vthe essential feature is the provision wherebythe coremay firstbe collapsed as to width, so that the overlapping,telescoping part and the widened lower edge (where Vthis plan isfollowed) can be brought t0-y gether to clear kthe formation, followingwhich the length'fof the coreis reduced to clear thebonds. To facilitateplacing and holding the coreagainst lateral displacement', lugs 18, i8,are provided, one at each of the eight corners of the core. j y

More or less slight changes might be made in the form and arrangementofthe several parts Vdescribed without departing from the spiritandscope of our invention, and hence we do not wish to be vlimited totheeXact construction herein set forth, but Y Y Vefclaimz- Y. Y

1. A Vcollapsible core comprising flexible]V sides, rods pivotallymounted along the'inside thereof, links on the ends of the rods, thelinks of each rod having engagement with the links of the adjacent rodfor connecting the sides together, said'links adapted to be actuated forexpanding the core, and maintaining the sides in said position Aandforcausing va collapse of the core by drawing the sides toward eachother.

.2.-A collapsible core for molding, comprising flexiblertelescopic sidesand ends, rods pivotally mounted along the inside thereof, links on theends of the rods, the links of 'each rod having engagement with thelinks ofthe adjacent rod for connecting thefsides together, said linksadapted to .be actuated for expanding the corey and maintaining thesides insaid position and for causinga collapse of the sideswidthwise,thereby permitting they collapsing o., the core lengthwise. y y 3. Acollapsible core ,for molding Ycomprisingeitensible `sides andV ends,rods pivoted` vertically on the inner faces of the sides, toggle jointsconnecting the rods across from opposite sides, means for lengtheningand shortening said toggle joints, and a connecting rod'eXtending fromone vertical rod to another whereby to operate the toggle rjoints atdierent points, within the collapsible core, simultaneously.

In testimony whereof we affixfour'signa tures, in thefpresence of twowitnesses. f Y LYMAN C. STEX/TAI'I.-k LMARSHALL QUINN.- l -Witnesses: iy

y LEONARD VA. HUBER,

EDGAR IFI.V MGGRAw.

4Copies of this patent may he obtained for five cents each, byaddressing the commissigner of raam.

y Washington, D. C.

